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This working paper seeks to elucidate the current estimates for transport infrastructure requirements, looking at a series of reports that consider projected global infrastructure needs in the coming few decades, and provide or quote a cost estimate for these needs.

Recent economic research estimates a $4.1 to 4.3 trillion annual investment gap between the urban infrastructure we have and the amount we need. That's why WRI Ross Center for Sustainable Cities, C40 and the Citi Foundation are partnering to help cities around the world accelerate the implementation of low-carbon urban solutions.

China recently issued its first directive on “green bonds,” funds exclusively applied to finance new and existing green infrastructure projects. The new standards should help scale up the use of green bonds and usher in new low-carbon projects like renewable energy and public transit systems.

A new initiative launched in Paris this week demonstrates the growing recognition that action by financial institutions – both public and private – is necessary to begin shifting trillions of dollars toward low-carbon development.

In Paris today, a coalition of more than a dozen African countries, nine financing organizations and 10 technical partners announced a new initiative called the African Restoration Initiative (AFR100), with the goal of restoring 100 million hectares of degraded and deforested land in Africa by 2030.

As of this Monday, 174 countries had submitted their national climate plans to the UN, in preparation for the Paris climate summit that begins next week. These “Intended Nationally Determined Contributions” (INDCs) show countries are stepping up to take collective action to address climate change. Governments have set out a variety of different approaches, including specifying absolute emissions-reduction targets, setting economy-wide emissions intensity goals, outlining efforts to adapt to the impacts of climate change, and detailing specific actions they plan to take in a range of...